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iOS

Posted by Simen Anthonsen
Simen Anthonsen
1,097 Points

Array of UITextfields

If i create an array of textfields like this

                        var textfields = [textfield1, textfield2]

I get an error saying " Instance member "textfield1" cannot be used on type viewController.

It works if i create the array inside of a function, but it is necessary to have the array outside of the a function.

Caleb Kleveter
Caleb Kleveter
Treehouse Moderator 37,862 Points

Why does it have to be outside of a function? Why can't you put it in the viewDidLoad?

Simen Anthonsen
Simen Anthonsen
1,097 Points

I need to be able to modify(append and remove) the array by the help of other functions. I can´t do that if var textfields is a local. I need it to be an instance variable.

Caleb Kleveter
Caleb Kleveter
Treehouse Moderator 37,862 Points

If you are only appending and removing you should be fine creating the array in the viewDidLoad. Guess I was wrong.

Simen Anthonsen
Simen Anthonsen
1,097 Points

If I do as you say and create the array in the viewdidload, I won´t be able to for example remove a textfield by pushing a button.

1 Answer

Richard Lu
Richard Lu
20,185 Points

Hey Simen,

Have you tried using property observers on your textfields since it must be outside the function?

var textfields = [UITextField]()

var textfield1: UITextField! { didSet { textfields.append(textfield1) } }
var textfield2: UITextField! { didSet { textfields.append(textfield2) }}

The reason you may be getting that error is because the textfields are not initialized until run time.

- Rich

Simen Anthonsen
Simen Anthonsen
1,097 Points

Thanks!